The 2.6.29 is not released yet. The merge window is open. 

Some preliminary information on it are available in the following links :
 * [http://www.heise-online.co.uk/open/Kernel-Log-2-6-29-development-kicks-off-improved-3D-support--/news/112356 Kernel Log: 2.6.29 development kicks off, improved 3D support] (Heise online)
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CategoryReleases